Question

all the formula of polynomials (class 9)

Answer 1

Sorry I haven't been started reading that chapter

Answer 2

${(a + b})^{2} = {a }^{2} + {b}^{2} + 2ab \\ {(a + b})^{3} = {a}^{3} + {b}^{3 } + 3ab(a + b) \\ {(a - b})^{3} = {a}^{3} - {b}^{3} - 3ab(a - b) \\ {(a + b + c})^{2} = { a}^{2} + {b}^{2} + {c}^{2} + 2ab + 2bc + 2ca \\ {x}^{3} + {y}^{3} = (x + y)( {x}^{2} - xy + {y}^{2} ) \\ {x}^{3} - {y}^{3} = (x - y)( {x}^{2} + xy + {y}^{2} ) \\ {x}^{3} + {y}^{3 } + { z}^{3}$